Facebook also announced this week that its active mobile users were up by 51 percent this year compared to last year, an important indicator for financial experts.

In Gustin's Time article in May, he said Facebook was beginning to turn things around with its mobile users.

"In the first quarter of 2012, Facebook’s mobile revenue constituted zero percent of its total revenue," Gustin wrote. "Perhaps most important, Facebook’s share of mobile time spent online is (now) soaring, offsetting desktop declines. Facebook’s share of mobile minutes has doubled from 11 percent to 22 percent over the last year, according to JP Morgan. The company has also begun packing more ads into the News Feed."